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Finding the Fourth Proportional to 1,853.36, 2,779.59 and 620.45

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Solution

The fourth proportional to 1,853.36, 2,779.59 and 620.45 is: 930.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,853.36 : 2,779.59 = 620.45 : x
  2. Step 2: Convert to fraction form
    1,853.36/2,779.59 = 620.45/x
  3. Step 3: Cross multiply
    1,853.36x = 2,779.59 × 620.45
  4. Step 4: Simplify right side
    1,853.36x = 1,724,605.89
  5. Step 5: Solve for x
    x = 1,724,605.89/1,853.36
  6. Step 6: Final answer
    x = 930.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.